[Elecraft] Re: K3 selectivity display?

[Craig Rairdin]

On Nov 14, 2007, at 2:05 PM, Craig D. Smith wrote:

> Why should I need to remember what roofing
> filter I installed in each slot?  Besides, the filters might be 
> swapped from
> time to time.  My personal preference would be to see the nominal 
> roofing
> filter bandwidth displayed rather than the FL number.  

When you tap XFIL to rotate through the filters the discrete FLn indicator
lights up for that filter and also the VFO B display says "FL3 0.40", "FL4
0.25", etc. So you don't really have to remember. 

Also my tendency is to use the WIDTH control to just dial it down and not
really think about what the absolute width is. If I can make out the signal
better, I'm happy. But either way (XFIL or WIDTH) the width is displayed.
You don't have to remember what's in what slot.

Also, you only have to take off half the bottom cover to change or move a
filter. It's the easy half IMHO.

FYI: I've been playing with both the 200 Hz 5-pole and 250 Hz 8-pole filters
and so far in my purely subjective tests I can't tell the difference between
them. What I think this means is that if you're not a numbers purist you can
get by with the cheaper 5-pole filter and probably never know the
difference. If performance means everything to you then by all means spend
more for the 250 Hz 8-pole filter and you'll be happy, too.

Craig
NZ0R
K3 #25